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CodecTest.cpp
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/*
* Copyright 2015 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "include/codec/SkAndroidCodec.h"
#include "include/codec/SkCodec.h"
#include "include/codec/SkEncodedImageFormat.h"
#include "include/codec/SkGifDecoder.h"
#include "include/codec/SkJpegDecoder.h"
#include "include/codec/SkPngChunkReader.h"
#include "include/core/SkAlphaType.h"
#include "include/core/SkBitmap.h"
#include "include/core/SkCanvas.h"
#include "include/core/SkColor.h"
#include "include/core/SkColorSpace.h"
#include "include/core/SkColorType.h"
#include "include/core/SkData.h"
#include "include/core/SkDataTable.h"
#include "include/core/SkImage.h"
#include "include/core/SkImageGenerator.h"
#include "include/core/SkImageInfo.h"
#include "include/core/SkPixmap.h"
#include "include/core/SkRect.h"
#include "include/core/SkRefCnt.h"
#include "include/core/SkSize.h"
#include "include/core/SkStream.h"
#include "include/core/SkString.h"
#include "include/core/SkTypes.h"
#include "include/encode/SkJpegEncoder.h"
#include "include/encode/SkPngEncoder.h"
#include "include/encode/SkWebpEncoder.h"
#include "include/private/base/SkAlign.h"
#include "include/private/base/SkDebug.h"
#include "include/private/base/SkMalloc.h"
#include "include/private/base/SkTemplates.h"
#include "modules/skcms/skcms.h"
#include "src/base/SkAutoMalloc.h"
#include "src/base/SkRandom.h"
#include "src/codec/SkCodecImageGenerator.h"
#include "src/core/SkColorSpacePriv.h"
#include "src/core/SkMD5.h"
#include "src/core/SkStreamPriv.h"
#include "tests/FakeStreams.h"
#include "tests/Test.h"
#include "tools/DecodeUtils.h"
#include "tools/Resources.h"
#include "tools/ToolUtils.h"
#ifdef SK_ENABLE_ANDROID_UTILS
#include "client_utils/android/FrontBufferedStream.h"
#endif
#include <png.h>
#include <pngconf.h>
#include <setjmp.h>
#include <algorithm>
#include <cstdint>
#include <cstring>
#include <initializer_list>
#include <memory>
#include <utility>
#include <vector>
using namespace skia_private;
#if PNG_LIBPNG_VER_MAJOR == 1 && PNG_LIBPNG_VER_MINOR < 5
// FIXME (scroggo): Google3 needs to be updated to use a newer version of libpng. In
// the meantime, we had to break some pieces of SkPngCodec in order to support Google3.
// The parts that are broken are likely not used by Google3.
#define SK_PNG_DISABLE_TESTS
#endif
static SkMD5::Digest md5(const SkBitmap& bm) {
SkASSERT(bm.getPixels());
SkMD5 md5;
size_t rowLen = bm.info().bytesPerPixel() * bm.width();
for (int y = 0; y < bm.height(); ++y) {
md5.write(bm.getAddr(0, y), rowLen);
}
return md5.finish();
}
/**
* Compute the digest for bm and compare it to a known good digest.
* @param r Reporter to assert that bm's digest matches goodDigest.
* @param goodDigest The known good digest to compare to.
* @param bm The bitmap to test.
*/
static void compare_to_good_digest(skiatest::Reporter* r, const SkMD5::Digest& goodDigest,
const SkBitmap& bm) {
SkMD5::Digest digest = md5(bm);
REPORTER_ASSERT(r, digest == goodDigest);
}
/**
* Test decoding an SkCodec to a particular SkImageInfo.
*
* Calling getPixels(info) should return expectedResult, and if goodDigest is non nullptr,
* the resulting decode should match.
*/
template<typename Codec>
static void test_info(skiatest::Reporter* r, Codec* codec, const SkImageInfo& info,
SkCodec::Result expectedResult, const SkMD5::Digest* goodDigest) {
SkBitmap bm;
bm.allocPixels(info);
SkCodec::Result result = codec->getPixels(info, bm.getPixels(), bm.rowBytes());
REPORTER_ASSERT(r, result == expectedResult);
if (goodDigest) {
compare_to_good_digest(r, *goodDigest, bm);
}
}
SkIRect generate_random_subset(SkRandom* rand, int w, int h) {
SkIRect rect;
do {
rect.fLeft = rand->nextRangeU(0, w);
rect.fTop = rand->nextRangeU(0, h);
rect.fRight = rand->nextRangeU(0, w);
rect.fBottom = rand->nextRangeU(0, h);
rect.sort();
} while (rect.isEmpty());
return rect;
}
static void test_incremental_decode(skiatest::Reporter* r, SkCodec* codec, const SkImageInfo& info,
const SkMD5::Digest& goodDigest) {
SkBitmap bm;
bm.allocPixels(info);
REPORTER_ASSERT(r, SkCodec::kSuccess == codec->startIncrementalDecode(info, bm.getPixels(),
bm.rowBytes()));
REPORTER_ASSERT(r, SkCodec::kSuccess == codec->incrementalDecode());
compare_to_good_digest(r, goodDigest, bm);
}
// Test in stripes, similar to DM's kStripe_Mode
static void test_in_stripes(skiatest::Reporter* r, SkCodec* codec, const SkImageInfo& info,
const SkMD5::Digest& goodDigest) {
SkBitmap bm;
bm.allocPixels(info);
bm.eraseColor(SK_ColorYELLOW);
const int height = info.height();
// Note that if numStripes does not evenly divide height there will be an extra
// stripe.
const int numStripes = 4;
if (numStripes > height) {
// Image is too small.
return;
}
const int stripeHeight = height / numStripes;
// Iterate through the image twice. Once to decode odd stripes, and once for even.
for (int oddEven = 1; oddEven >= 0; oddEven--) {
for (int y = oddEven * stripeHeight; y < height; y += 2 * stripeHeight) {
SkIRect subset = SkIRect::MakeLTRB(0, y, info.width(),
std::min(y + stripeHeight, height));
SkCodec::Options options;
options.fSubset = ⊂
if (SkCodec::kSuccess != codec->startIncrementalDecode(info, bm.getAddr(0, y),
bm.rowBytes(), &options)) {
ERRORF(r, "failed to start incremental decode!\ttop: %i\tbottom%i\n",
subset.top(), subset.bottom());
return;
}
if (SkCodec::kSuccess != codec->incrementalDecode()) {
ERRORF(r, "failed incremental decode starting from line %i\n", y);
return;
}
}
}
compare_to_good_digest(r, goodDigest, bm);
}
template<typename Codec>
static void test_codec(skiatest::Reporter* r, const char* path, Codec* codec, SkBitmap& bm,
const SkImageInfo& info, const SkISize& size, SkCodec::Result expectedResult,
SkMD5::Digest* digest, const SkMD5::Digest* goodDigest) {
REPORTER_ASSERT(r, info.dimensions() == size);
bm.allocPixels(info);
SkCodec::Result result = codec->getPixels(info, bm.getPixels(), bm.rowBytes());
REPORTER_ASSERT(r, result == expectedResult);
*digest = md5(bm);
if (goodDigest) {
REPORTER_ASSERT(r, *digest == *goodDigest);
}
{
// Test decoding to 565
SkImageInfo info565 = info.makeColorType(kRGB_565_SkColorType);
if (info.alphaType() == kOpaque_SkAlphaType) {
// Decoding to 565 should succeed.
SkBitmap bm565;
bm565.allocPixels(info565);
// This will allow comparison even if the image is incomplete.
bm565.eraseColor(SK_ColorBLACK);
auto actualResult = codec->getPixels(info565, bm565.getPixels(), bm565.rowBytes());
if (actualResult == expectedResult) {
SkMD5::Digest digest565 = md5(bm565);
// A request for non-opaque should also succeed.
for (auto alpha : { kPremul_SkAlphaType, kUnpremul_SkAlphaType }) {
info565 = info565.makeAlphaType(alpha);
test_info(r, codec, info565, expectedResult, &digest565);
}
} else {
ERRORF(r, "Decoding %s to 565 failed with result \"%s\"\n\t\t\t\texpected:\"%s\"",
path,
SkCodec::ResultToString(actualResult),
SkCodec::ResultToString(expectedResult));
}
} else {
test_info(r, codec, info565, SkCodec::kInvalidConversion, nullptr);
}
}
if (codec->getInfo().colorType() == kGray_8_SkColorType) {
SkImageInfo grayInfo = codec->getInfo();
SkBitmap grayBm;
grayBm.allocPixels(grayInfo);
grayBm.eraseColor(SK_ColorBLACK);
REPORTER_ASSERT(r, expectedResult == codec->getPixels(grayInfo,
grayBm.getPixels(), grayBm.rowBytes()));
SkMD5::Digest grayDigest = md5(grayBm);
for (auto alpha : { kPremul_SkAlphaType, kUnpremul_SkAlphaType }) {
grayInfo = grayInfo.makeAlphaType(alpha);
test_info(r, codec, grayInfo, expectedResult, &grayDigest);
}
}
// Verify that re-decoding gives the same result. It is interesting to check this after
// a decode to 565, since choosing to decode to 565 may result in some of the decode
// options being modified. These options should return to their defaults on another
// decode to kN32, so the new digest should match the old digest.
test_info(r, codec, info, expectedResult, digest);
{
// Check alpha type conversions
if (info.alphaType() == kOpaque_SkAlphaType) {
test_info(r, codec, info.makeAlphaType(kUnpremul_SkAlphaType),
expectedResult, digest);
test_info(r, codec, info.makeAlphaType(kPremul_SkAlphaType),
expectedResult, digest);
} else {
// Decoding to opaque should fail
test_info(r, codec, info.makeAlphaType(kOpaque_SkAlphaType),
SkCodec::kInvalidConversion, nullptr);
SkAlphaType otherAt = info.alphaType();
if (kPremul_SkAlphaType == otherAt) {
otherAt = kUnpremul_SkAlphaType;
} else {
otherAt = kPremul_SkAlphaType;
}
// The other non-opaque alpha type should always succeed, but not match.
test_info(r, codec, info.makeAlphaType(otherAt), expectedResult, nullptr);
}
}
}
static bool supports_partial_scanlines(const char path[]) {
static const char* const exts[] = {
"jpg", "jpeg", "png", "webp",
"JPG", "JPEG", "PNG", "WEBP"
};
for (uint32_t i = 0; i < std::size(exts); i++) {
if (SkStrEndsWith(path, exts[i])) {
return true;
}
}
return false;
}
static void check_scanline_decode(skiatest::Reporter* r,
SkCodec* codec,
SkMD5::Digest* codecDigest,
const SkImageInfo& info,
const char path[],
SkISize size,
bool supportsScanlineDecoding,
bool supportsIncomplete,
bool supportsNewScanlineDecoding) {
// Test full image decodes with SkCodec
SkBitmap bm;
const SkCodec::Result expectedResult = supportsIncomplete ? SkCodec::kIncompleteInput
: SkCodec::kSuccess;
test_codec(r, path, codec, bm, info, size, expectedResult, codecDigest, nullptr);
// Scanline decoding follows.
if (supportsNewScanlineDecoding && !supportsIncomplete) {
test_incremental_decode(r, codec, info, *codecDigest);
// This is only supported by codecs that use incremental decoding to
// support subset decodes - png and jpeg (once SkJpegCodec is
// converted).
if (SkStrEndsWith(path, "png") || SkStrEndsWith(path, "PNG")) {
test_in_stripes(r, codec, info, *codecDigest);
}
}
// Need to call startScanlineDecode() first.
REPORTER_ASSERT(r, codec->getScanlines(bm.getAddr(0, 0), 1, 0) == 0);
REPORTER_ASSERT(r, !codec->skipScanlines(1));
const SkCodec::Result startResult = codec->startScanlineDecode(info);
if (supportsScanlineDecoding) {
bm.eraseColor(SK_ColorYELLOW);
REPORTER_ASSERT(r, startResult == SkCodec::kSuccess);
for (int y = 0; y < info.height(); y++) {
const int lines = codec->getScanlines(bm.getAddr(0, y), 1, 0);
if (!supportsIncomplete) {
REPORTER_ASSERT(r, 1 == lines);
}
}
// verify that scanline decoding gives the same result.
if (SkCodec::kTopDown_SkScanlineOrder == codec->getScanlineOrder()) {
compare_to_good_digest(r, *codecDigest, bm);
}
// Cannot continue to decode scanlines beyond the end
REPORTER_ASSERT(r, codec->getScanlines(bm.getAddr(0, 0), 1, 0)
== 0);
// Interrupting a scanline decode with a full decode starts from
// scratch
{
REPORTER_ASSERT(r, codec->startScanlineDecode(info) == SkCodec::kSuccess);
const int lines = codec->getScanlines(bm.getAddr(0, 0), 1, 0);
if (!supportsIncomplete) {
REPORTER_ASSERT(r, lines == 1);
}
REPORTER_ASSERT(r, codec->getPixels(bm.info(), bm.getPixels(), bm.rowBytes())
== expectedResult);
REPORTER_ASSERT(r, codec->getScanlines(bm.getAddr(0, 0), 1, 0)
== 0);
REPORTER_ASSERT(r, codec->skipScanlines(1)
== 0);
}
// Test partial scanline decodes
if (supports_partial_scanlines(path) && info.width() >= 3) {
SkCodec::Options options;
int width = info.width();
int height = info.height();
SkIRect subset = SkIRect::MakeXYWH(2 * (width / 3), 0, width / 3, height);
options.fSubset = ⊂
const auto partialStartResult = codec->startScanlineDecode(info, &options);
REPORTER_ASSERT(r, partialStartResult == SkCodec::kSuccess);
for (int y = 0; y < height; y++) {
const int lines = codec->getScanlines(bm.getAddr(0, y), 1, 0);
if (!supportsIncomplete) {
REPORTER_ASSERT(r, 1 == lines);
}
}
}
} else {
REPORTER_ASSERT(r, startResult == SkCodec::kUnimplemented);
}
}
static void check_subset_decode(skiatest::Reporter* r,
SkCodec* codec,
const SkImageInfo& info,
SkISize size,
bool supportsSubsetDecoding,
bool supportsIncomplete) {
// This function tests decoding subsets, and will decode a handful of randomly-sized subsets.
// Do not attempt to decode subsets of an image of only one pixel, since there is no
// meaningful subset.
if (size.width() * size.height() == 1) {
return;
}
SkRandom rand;
SkIRect subset;
SkCodec::Options opts;
opts.fSubset = ⊂
for (int i = 0; i < 5; i++) {
subset = generate_random_subset(&rand, size.width(), size.height());
SkASSERT(!subset.isEmpty());
const bool supported = codec->getValidSubset(&subset);
REPORTER_ASSERT(r, supported == supportsSubsetDecoding);
SkImageInfo subsetInfo = info.makeDimensions(subset.size());
SkBitmap bm;
bm.allocPixels(subsetInfo);
const auto result = codec->getPixels(bm.info(), bm.getPixels(), bm.rowBytes(), &opts);
if (supportsSubsetDecoding) {
if (!supportsIncomplete) {
REPORTER_ASSERT(r, result == SkCodec::kSuccess);
}
// Webp is the only codec that supports subsets, and it will have modified the subset
// to have even left/top.
REPORTER_ASSERT(r, SkIsAlign2(subset.fLeft) && SkIsAlign2(subset.fTop));
} else {
// No subsets will work.
REPORTER_ASSERT(r, result == SkCodec::kUnimplemented);
}
}
}
static void check_android_codec(skiatest::Reporter* r,
std::unique_ptr<SkCodec> codec,
const SkMD5::Digest& codecDigest,
const SkImageInfo& info,
const char path[],
SkISize size,
bool supportsScanlineDecoding,
bool supportsSubsetDecoding,
bool supportsIncomplete,
bool supportsNewScanlineDecoding) {
if (supportsScanlineDecoding || supportsSubsetDecoding || supportsNewScanlineDecoding) {
auto androidCodec = SkAndroidCodec::MakeFromCodec(std::move(codec));
if (!androidCodec) {
ERRORF(r, "Unable to decode '%s'", path);
return;
}
SkBitmap bm;
SkMD5::Digest androidCodecDigest;
const SkCodec::Result expectedResult = supportsIncomplete ? SkCodec::kIncompleteInput
: SkCodec::kSuccess;
test_codec(r, path, androidCodec.get(), bm, info, size, expectedResult, &androidCodecDigest,
&codecDigest);
}
}
static void check_codec_image_generator(skiatest::Reporter* r,
const SkMD5::Digest& codecDigest,
const SkImageInfo& info,
const char path[],
bool supportsIncomplete) {
// Test SkCodecImageGenerator
if (!supportsIncomplete) {
std::unique_ptr<SkStream> stream(GetResourceAsStream(path));
sk_sp<SkData> fullData(SkData::MakeFromStream(stream.get(), stream->getLength()));
std::unique_ptr<SkImageGenerator> gen(
SkCodecImageGenerator::MakeFromEncodedCodec(fullData));
SkBitmap bm;
bm.allocPixels(info);
REPORTER_ASSERT(r, gen->getPixels(info, bm.getPixels(), bm.rowBytes()));
compare_to_good_digest(r, codecDigest, bm);
#if !defined(SK_PNG_DISABLE_TESTS) && defined(SK_ENABLE_ANDROID_UTILS)
// Test using FrontBufferedStream, as Android does
auto bufferedStream = android::skia::FrontBufferedStream::Make(
SkMemoryStream::Make(std::move(fullData)), SkCodec::MinBufferedBytesNeeded());
REPORTER_ASSERT(r, bufferedStream);
std::unique_ptr<SkCodec> codec = SkCodec::MakeFromStream(std::move(bufferedStream));
REPORTER_ASSERT(r, codec);
if (codec) {
test_info(r, codec.get(), info, SkCodec::kSuccess, &codecDigest);
}
#endif
}
}
static void check(skiatest::Reporter* r,
const char path[],
SkISize size,
bool supportsScanlineDecoding,
bool supportsSubsetDecoding,
bool supportsIncomplete,
bool supportsNewScanlineDecoding = false) {
// If we're testing incomplete decodes, let's run the same test on full decodes.
if (supportsIncomplete) {
check(r, path, size, supportsScanlineDecoding, supportsSubsetDecoding,
/*supportsIncomplete=*/false, supportsNewScanlineDecoding);
}
// Initialize a codec with a data stream.
std::unique_ptr<SkStream> stream(GetResourceAsStream(path));
if (!stream) {
return;
}
std::unique_ptr<SkCodec> codec;
if (supportsIncomplete) {
size_t length = stream->getLength();
codec = SkCodec::MakeFromData(SkData::MakeFromStream(stream.get(), 2 * length / 3));
} else {
codec = SkCodec::MakeFromStream(std::move(stream));
}
if (!codec) {
ERRORF(r, "Unable to decode '%s'", path);
return;
}
const SkImageInfo info = codec->getInfo().makeColorType(kN32_SkColorType);
// Run tests with this codec.
SkMD5::Digest codecDigest;
check_scanline_decode(r, codec.get(), &codecDigest, info, path, size, supportsScanlineDecoding,
supportsIncomplete, supportsNewScanlineDecoding);
check_subset_decode(r, codec.get(), info, size, supportsSubsetDecoding, supportsIncomplete);
check_android_codec(r, std::move(codec), codecDigest, info, path, size,
supportsScanlineDecoding, supportsSubsetDecoding, supportsIncomplete,
supportsNewScanlineDecoding);
check_codec_image_generator(r, codecDigest, info, path, supportsIncomplete);
}
DEF_TEST(Codec_wbmp, r) {
check(r, "images/mandrill.wbmp", SkISize::Make(512, 512), true, false, true);
}
DEF_TEST(Codec_webp, r) {
check(r, "images/baby_tux.webp", SkISize::Make(386, 395), false, true, true);
check(r, "images/color_wheel.webp", SkISize::Make(128, 128), false, true, true);
check(r, "images/yellow_rose.webp", SkISize::Make(400, 301), false, true, true);
}
DEF_TEST(Codec_bmp, r) {
check(r, "images/randPixels.bmp", SkISize::Make(8, 8), true, false, true);
check(r, "images/rle.bmp", SkISize::Make(320, 240), true, false, true);
}
DEF_TEST(Codec_ico, r) {
// FIXME: We are not ready to test incomplete ICOs
// These two tests examine interestingly different behavior:
// Decodes an embedded BMP image
check(r, "images/color_wheel.ico", SkISize::Make(128, 128), true, false, false);
// Decodes an embedded PNG image
check(r, "images/google_chrome.ico", SkISize::Make(256, 256), false, false, false, true);
}
DEF_TEST(Codec_gif, r) {
check(r, "images/box.gif", SkISize::Make(200, 55), false, false, true, true);
check(r, "images/color_wheel.gif", SkISize::Make(128, 128), false, false, true, true);
// randPixels.gif is too small to test incomplete
check(r, "images/randPixels.gif", SkISize::Make(8, 8), false, false, false, true);
}
DEF_TEST(Codec_jpg, r) {
check(r, "images/CMYK.jpg", SkISize::Make(642, 516), true, false, true);
check(r, "images/color_wheel.jpg", SkISize::Make(128, 128), true, false, true);
// grayscale.jpg is too small to test incomplete
check(r, "images/grayscale.jpg", SkISize::Make(128, 128), true, false, false);
check(r, "images/mandrill_512_q075.jpg", SkISize::Make(512, 512), true, false, true);
// randPixels.jpg is too small to test incomplete
check(r, "images/randPixels.jpg", SkISize::Make(8, 8), true, false, false);
}
DEF_TEST(Codec_png, r) {
check(r, "images/arrow.png", SkISize::Make(187, 312), false, false, true, true);
check(r, "images/baby_tux.png", SkISize::Make(240, 246), false, false, true, true);
check(r, "images/color_wheel.png", SkISize::Make(128, 128), false, false, true, true);
// half-transparent-white-pixel.png is too small to test incomplete
check(r, "images/half-transparent-white-pixel.png", SkISize::Make(1, 1), false, false, false, true);
check(r, "images/mandrill_128.png", SkISize::Make(128, 128), false, false, true, true);
// mandrill_16.png is too small (relative to embedded sRGB profile) to test incomplete
check(r, "images/mandrill_16.png", SkISize::Make(16, 16), false, false, false, true);
check(r, "images/mandrill_256.png", SkISize::Make(256, 256), false, false, true, true);
check(r, "images/mandrill_32.png", SkISize::Make(32, 32), false, false, true, true);
check(r, "images/mandrill_512.png", SkISize::Make(512, 512), false, false, true, true);
check(r, "images/mandrill_64.png", SkISize::Make(64, 64), false, false, true, true);
check(r, "images/plane.png", SkISize::Make(250, 126), false, false, true, true);
check(r, "images/plane_interlaced.png", SkISize::Make(250, 126), false, false, true, true);
check(r, "images/randPixels.png", SkISize::Make(8, 8), false, false, true, true);
check(r, "images/yellow_rose.png", SkISize::Make(400, 301), false, false, true, true);
}
// Disable RAW tests for Win32.
#if defined(SK_CODEC_DECODES_RAW) && (!defined(_WIN32))
DEF_TEST(Codec_raw, r) {
check(r, "images/sample_1mp.dng", SkISize::Make(600, 338), false, false, false);
check(r, "images/sample_1mp_rotated.dng", SkISize::Make(600, 338), false, false, false);
check(r, "images/dng_with_preview.dng", SkISize::Make(600, 338), true, false, false);
}
#endif
static void test_invalid_stream(skiatest::Reporter* r, const void* stream, size_t len) {
// Neither of these calls should return a codec. Bots should catch us if we leaked anything.
REPORTER_ASSERT(r, !SkCodec::MakeFromStream(
std::make_unique<SkMemoryStream>(stream, len, false)));
REPORTER_ASSERT(r, !SkAndroidCodec::MakeFromStream(
std::make_unique<SkMemoryStream>(stream, len, false)));
}
// Ensure that SkCodec::NewFromStream handles freeing the passed in SkStream,
// even on failure. Test some bad streams.
DEF_TEST(Codec_leaks, r) {
// No codec should claim this as their format, so this tests SkCodec::NewFromStream.
const char nonSupportedStream[] = "hello world";
// The other strings should look like the beginning of a file type, so we'll call some
// internal version of NewFromStream, which must also delete the stream on failure.
const unsigned char emptyPng[] = { 0x89, 0x50, 0x4e, 0x47, 0x0d, 0x0a, 0x1a, 0x0a };
const unsigned char emptyJpeg[] = { 0xFF, 0xD8, 0xFF };
const char emptyWebp[] = "RIFF1234WEBPVP";
const char emptyBmp[] = { 'B', 'M' };
const char emptyIco[] = { '\x00', '\x00', '\x01', '\x00' };
const char emptyGif[] = "GIFVER";
test_invalid_stream(r, nonSupportedStream, sizeof(nonSupportedStream));
test_invalid_stream(r, emptyPng, sizeof(emptyPng));
test_invalid_stream(r, emptyJpeg, sizeof(emptyJpeg));
test_invalid_stream(r, emptyWebp, sizeof(emptyWebp));
test_invalid_stream(r, emptyBmp, sizeof(emptyBmp));
test_invalid_stream(r, emptyIco, sizeof(emptyIco));
test_invalid_stream(r, emptyGif, sizeof(emptyGif));
}
DEF_TEST(Codec_null, r) {
// Attempting to create an SkCodec or an SkAndroidCodec with null should not
// crash.
REPORTER_ASSERT(r, !SkCodec::MakeFromStream(nullptr));
REPORTER_ASSERT(r, !SkAndroidCodec::MakeFromStream(nullptr));
}
static void test_dimensions(skiatest::Reporter* r, const char path[]) {
// Create the codec from the resource file
std::unique_ptr<SkStream> stream(GetResourceAsStream(path));
if (!stream) {
return;
}
std::unique_ptr<SkAndroidCodec> codec(SkAndroidCodec::MakeFromStream(std::move(stream)));
if (!codec) {
ERRORF(r, "Unable to create codec '%s'", path);
return;
}
// Check that the decode is successful for a variety of scales
for (int sampleSize = 1; sampleSize < 32; sampleSize++) {
// Scale the output dimensions
SkISize scaledDims = codec->getSampledDimensions(sampleSize);
SkImageInfo scaledInfo = codec->getInfo()
.makeDimensions(scaledDims)
.makeColorType(kN32_SkColorType);
// Set up for the decode
size_t rowBytes = scaledDims.width() * sizeof(SkPMColor);
size_t totalBytes = scaledInfo.computeByteSize(rowBytes);
AutoTMalloc<SkPMColor> pixels(totalBytes);
SkAndroidCodec::AndroidOptions options;
options.fSampleSize = sampleSize;
SkCodec::Result result =
codec->getAndroidPixels(scaledInfo, pixels.get(), rowBytes, &options);
if (result != SkCodec::kSuccess) {
ERRORF(r, "Failed to decode %s with sample size %i; error: %s", path, sampleSize,
SkCodec::ResultToString(result));
}
}
}
// Ensure that onGetScaledDimensions returns valid image dimensions to use for decodes
DEF_TEST(Codec_Dimensions, r) {
// JPG
test_dimensions(r, "images/CMYK.jpg");
test_dimensions(r, "images/color_wheel.jpg");
test_dimensions(r, "images/grayscale.jpg");
test_dimensions(r, "images/mandrill_512_q075.jpg");
test_dimensions(r, "images/randPixels.jpg");
// Decoding small images with very large scaling factors is a potential
// source of bugs and crashes. We disable these tests in Gold because
// tiny images are not very useful to look at.
// Here we make sure that we do not crash or access illegal memory when
// performing scaled decodes on small images.
test_dimensions(r, "images/1x1.png");
test_dimensions(r, "images/2x2.png");
test_dimensions(r, "images/3x3.png");
test_dimensions(r, "images/3x1.png");
test_dimensions(r, "images/1x1.png");
test_dimensions(r, "images/16x1.png");
test_dimensions(r, "images/1x16.png");
test_dimensions(r, "images/mandrill_16.png");
// RAW
// Disable RAW tests for Win32.
#if defined(SK_CODEC_DECODES_RAW) && (!defined(_WIN32))
test_dimensions(r, "images/sample_1mp.dng");
test_dimensions(r, "images/sample_1mp_rotated.dng");
test_dimensions(r, "images/dng_with_preview.dng");
#endif
}
static void test_invalid(skiatest::Reporter* r, const char path[]) {
auto data = GetResourceAsData(path);
if (!data) {
ERRORF(r, "Failed to get resource %s", path);
return;
}
REPORTER_ASSERT(r, !SkCodec::MakeFromData(data));
}
DEF_TEST(Codec_Empty, r) {
if (GetResourcePath().isEmpty()) {
return;
}
// Test images that should not be able to create a codec
test_invalid(r, "empty_images/zero-dims.gif");
test_invalid(r, "empty_images/zero-embedded.ico");
test_invalid(r, "empty_images/zero-width.bmp");
test_invalid(r, "empty_images/zero-height.bmp");
test_invalid(r, "empty_images/zero-width.jpg");
test_invalid(r, "empty_images/zero-height.jpg");
test_invalid(r, "empty_images/zero-width.png");
test_invalid(r, "empty_images/zero-height.png");
test_invalid(r, "empty_images/zero-width.wbmp");
test_invalid(r, "empty_images/zero-height.wbmp");
// This image is an ico with an embedded mask-bmp. This is illegal.
test_invalid(r, "invalid_images/mask-bmp-ico.ico");
// It is illegal for a webp frame to not be fully contained by the canvas.
test_invalid(r, "invalid_images/invalid-offset.webp");
#if defined(SK_CODEC_DECODES_RAW) && (!defined(_WIN32))
test_invalid(r, "empty_images/zero_height.tiff");
#endif
test_invalid(r, "invalid_images/b37623797.ico");
test_invalid(r, "invalid_images/osfuzz6295.webp");
test_invalid(r, "invalid_images/osfuzz6288.bmp");
test_invalid(r, "invalid_images/ossfuzz6347");
}
#ifdef PNG_READ_UNKNOWN_CHUNKS_SUPPORTED
#ifndef SK_PNG_DISABLE_TESTS // reading chunks does not work properly with older versions.
// It does not appear that anyone in Google3 is reading chunks.
static void codex_test_write_fn(png_structp png_ptr, png_bytep data, png_size_t len) {
SkWStream* sk_stream = (SkWStream*)png_get_io_ptr(png_ptr);
if (!sk_stream->write(data, len)) {
png_error(png_ptr, "sk_write_fn Error!");
}
}
DEF_TEST(Codec_pngChunkReader, r) {
// Create a bitmap for hashing. Use unpremul RGBA for libpng.
SkBitmap bm;
const int w = 1;
const int h = 1;
const SkImageInfo bmInfo = SkImageInfo::Make(w, h, kRGBA_8888_SkColorType,
kUnpremul_SkAlphaType);
bm.setInfo(bmInfo);
bm.allocPixels();
bm.eraseColor(SK_ColorBLUE);
SkMD5::Digest goodDigest = md5(bm);
// Write to a png file.
png_structp png = png_create_write_struct(PNG_LIBPNG_VER_STRING, nullptr, nullptr, nullptr);
REPORTER_ASSERT(r, png);
if (!png) {
return;
}
png_infop info = png_create_info_struct(png);
REPORTER_ASSERT(r, info);
if (!info) {
png_destroy_write_struct(&png, nullptr);
return;
}
if (setjmp(png_jmpbuf(png))) {
ERRORF(r, "failed writing png");
png_destroy_write_struct(&png, &info);
return;
}
SkDynamicMemoryWStream wStream;
png_set_write_fn(png, (void*) (&wStream), codex_test_write_fn, nullptr);
png_set_IHDR(png, info, (png_uint_32)w, (png_uint_32)h, 8,
PNG_COLOR_TYPE_RGB_ALPHA, PNG_INTERLACE_NONE,
PNG_COMPRESSION_TYPE_DEFAULT, PNG_FILTER_TYPE_DEFAULT);
#define PNG_BYTES(str) reinterpret_cast<png_byte*>(const_cast<char*>(str))
// Create some chunks that match the Android framework's use.
static png_unknown_chunk gUnknowns[] = {
{ "npOl", PNG_BYTES("outline"), sizeof("outline"), PNG_HAVE_IHDR },
{ "npLb", PNG_BYTES("layoutBounds"), sizeof("layoutBounds"), PNG_HAVE_IHDR },
{ "npTc", PNG_BYTES("ninePatchData"), sizeof("ninePatchData"), PNG_HAVE_IHDR },
};
png_set_keep_unknown_chunks(png, PNG_HANDLE_CHUNK_ALWAYS, PNG_BYTES("npOl\0npLb\0npTc\0"), 3);
png_set_unknown_chunks(png, info, gUnknowns, std::size(gUnknowns));
#if PNG_LIBPNG_VER < 10600
/* Deal with unknown chunk location bug in 1.5.x and earlier */
png_set_unknown_chunk_location(png, info, 0, PNG_HAVE_IHDR);
png_set_unknown_chunk_location(png, info, 1, PNG_HAVE_IHDR);
#endif
png_write_info(png, info);
for (int j = 0; j < h; j++) {
png_bytep row = (png_bytep)(bm.getAddr(0, j));
png_write_rows(png, &row, 1);
}
png_write_end(png, info);
png_destroy_write_struct(&png, &info);
class ChunkReader : public SkPngChunkReader {
public:
ChunkReader(skiatest::Reporter* r)
: fReporter(r)
{
this->reset();
}
bool readChunk(const char tag[], const void* data, size_t length) override {
for (size_t i = 0; i < std::size(gUnknowns); ++i) {
if (!strcmp(tag, (const char*) gUnknowns[i].name)) {
// Tag matches. This should have been the first time we see it.
REPORTER_ASSERT(fReporter, !fSeen[i]);
fSeen[i] = true;
// Data and length should match
REPORTER_ASSERT(fReporter, length == gUnknowns[i].size);
REPORTER_ASSERT(fReporter, !strcmp((const char*) data,
(const char*) gUnknowns[i].data));
return true;
}
}
ERRORF(fReporter, "Saw an unexpected unknown chunk.");
return true;
}
bool allHaveBeenSeen() {
bool ret = true;
for (auto seen : fSeen) {
ret &= seen;
}
return ret;
}
void reset() {
sk_bzero(fSeen, sizeof(fSeen));
}
private:
skiatest::Reporter* fReporter; // Unowned
bool fSeen[3];
};
ChunkReader chunkReader(r);
// Now read the file with SkCodec.
std::unique_ptr<SkCodec> codec(SkCodec::MakeFromData(wStream.detachAsData(), &chunkReader));
REPORTER_ASSERT(r, codec);
if (!codec) {
return;
}
// Now compare to the original.
SkBitmap decodedBm;
decodedBm.setInfo(codec->getInfo());
decodedBm.allocPixels();
SkCodec::Result result = codec->getPixels(codec->getInfo(), decodedBm.getPixels(),
decodedBm.rowBytes());
REPORTER_ASSERT(r, SkCodec::kSuccess == result);
if (decodedBm.colorType() != bm.colorType()) {
SkBitmap tmp;
bool success = ToolUtils::copy_to(&tmp, bm.colorType(), decodedBm);
REPORTER_ASSERT(r, success);
if (!success) {
return;
}
tmp.swap(decodedBm);
}
compare_to_good_digest(r, goodDigest, decodedBm);
REPORTER_ASSERT(r, chunkReader.allHaveBeenSeen());
// Decoding again will read the chunks again.
chunkReader.reset();
REPORTER_ASSERT(r, !chunkReader.allHaveBeenSeen());
result = codec->getPixels(codec->getInfo(), decodedBm.getPixels(), decodedBm.rowBytes());
REPORTER_ASSERT(r, SkCodec::kSuccess == result);
REPORTER_ASSERT(r, chunkReader.allHaveBeenSeen());
}
#endif // SK_PNG_DISABLE_TESTS
#endif // PNG_READ_UNKNOWN_CHUNKS_SUPPORTED
// Stream that can only peek up to a limit
class LimitedPeekingMemStream : public SkStream {
public:
LimitedPeekingMemStream(sk_sp<SkData> data, size_t limit)
: fStream(std::move(data))
, fLimit(limit) {}
size_t peek(void* buf, size_t bytes) const override {
return fStream.peek(buf, std::min(bytes, fLimit));
}
size_t read(void* buf, size_t bytes) override {
return fStream.read(buf, bytes);
}
bool rewind() override {
return fStream.rewind();
}
bool isAtEnd() const override {
return fStream.isAtEnd();
}
private:
SkMemoryStream fStream;
const size_t fLimit;
};
// Disable RAW tests for Win32.
#if defined(SK_CODEC_DECODES_RAW) && (!defined(_WIN32))
// Test that the RawCodec works also for not asset stream. This will test the code path using
// SkRawBufferedStream instead of SkRawAssetStream.
DEF_TEST(Codec_raw_notseekable, r) {
constexpr char path[] = "images/dng_with_preview.dng";
sk_sp<SkData> data(GetResourceAsData(path));
if (!data) {
SkDebugf("Missing resource '%s'\n", path);
return;
}
std::unique_ptr<SkCodec> codec(SkCodec::MakeFromStream(
std::make_unique<NotAssetMemStream>(std::move(data))));
REPORTER_ASSERT(r, codec);
test_info(r, codec.get(), codec->getInfo(), SkCodec::kSuccess, nullptr);
}
#endif
// Test that even if webp_parse_header fails to peek enough, it will fall back to read()
// + rewind() and succeed.
DEF_TEST(Codec_webp_peek, r) {
constexpr char path[] = "images/baby_tux.webp";
auto data = GetResourceAsData(path);
if (!data) {
SkDebugf("Missing resource '%s'\n", path);
return;
}
// The limit is less than webp needs to peek or read.
std::unique_ptr<SkCodec> codec(SkCodec::MakeFromStream(
std::make_unique<LimitedPeekingMemStream>(data, 25)));
REPORTER_ASSERT(r, codec);
test_info(r, codec.get(), codec->getInfo(), SkCodec::kSuccess, nullptr);
// Similarly, a stream which does not peek should still succeed.
codec = SkCodec::MakeFromStream(std::make_unique<LimitedPeekingMemStream>(data, 0));
REPORTER_ASSERT(r, codec);
test_info(r, codec.get(), codec->getInfo(), SkCodec::kSuccess, nullptr);
}
// SkCodec's wbmp decoder was initially unnecessarily restrictive.
// It required the second byte to be zero. The wbmp specification allows
// a couple of bits to be 1 (so long as they do not overlap with 0x9F).
// Test that SkCodec now supports an image with these bits set.
DEF_TEST(Codec_wbmp_restrictive, r) {
const char* path = "images/mandrill.wbmp";
std::unique_ptr<SkStream> stream(GetResourceAsStream(path));
if (!stream) {
return;
}
// Modify the stream to contain a second byte with some bits set.
auto data = SkCopyStreamToData(stream.get());
uint8_t* writeableData = static_cast<uint8_t*>(data->writable_data());
writeableData[1] = static_cast<uint8_t>(~0x9F);
// SkCodec should support this.
std::unique_ptr<SkCodec> codec(SkCodec::MakeFromData(data));
REPORTER_ASSERT(r, codec);
if (!codec) {
return;
}
test_info(r, codec.get(), codec->getInfo(), SkCodec::kSuccess, nullptr);
}
// wbmp images have a header that can be arbitrarily large, depending on the
// size of the image. We cap the size at 65535, meaning we only need to look at
// 8 bytes to determine whether we can read the image. This is important
// because SkCodec only passes a limited number of bytes to SkWbmpCodec to